HERTST, J. (2009). MAJOR INVENTIONS THROUGH HISTORY: THE HISTORY OF WEAPONS. LERNER BOOKS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHERTST, JUDITH. MAJOR INVENTIONS THROUGH HISTORY: THE HISTORY OF WEAPONS. LONDON: LERNER BOOKS, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHERTST, JUDITH. MAJOR INVENTIONS THROUGH HISTORY: THE HISTORY OF WEAPONS. LERNER BOOKS, 2009.
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